Composite dust suppressant for suppressing flying dust of metal mine and preparation method of composite dust suppressant

The invention provides a composite dust suppressant for suppressing flying dust of a metal mine and a preparation method of the composite dust suppressant, and belongs to the technical field of dust control. The dust suppressant mainly comprises a binder, a wetting agent and a water-retaining agent. The binder is sodium carboxymethyl cellulose; the wetting agent is fatty alcohol-polyoxyethylene ether; the water-retaining agent is polyethylene glycol. The three materials are simply and physically mixed by adding water to prepare the dust suppressant, the preparation process is simple and convenient, the preparation cost is low, and the raw materials are low in cost and easy to obtain. The dust suppressant has good flowability while having good water retention, wetting and bonding functions, and has applicability. After the dust suppressant is sprayed, a cured layer with certain strength can be formed on the surface of dust, so that the dust suppressant has good wind erosion resistance and better moisture reten